Products categories

M109R High Resistance Decade

Mechanic high resistance decade with RS232 remote control for voltages up to 5 kV. Internal battery for up to 3 hours of on site calibration.

  • 12 GΩ and 5 kVdc limits
  • Voltage limit indication
  • Battery-powered
  • Remote control via RS232 bus

M109R High Resistance Decade is designed for calibration of insulation meters and megaohmmeters and resistance ranges of safety testers, HIPOT testers or any other DC high resistance meter with test voltage up to 5 kV. Maximum voltage rating is indicated on front panel to ensure safety in operation. Internal rechargeable battery for up to 3 hours of grid-independent operation is standard part of delivery.


Even though the M109R looks mechanical, internal resistance standards are switched electronically by relays. This way we could fit it with RS232 remote control so it can be used in Caliber or any other automated calibration solution.

DC resistance 1 MΩ - 12 GΩ, 5 kV max.
± 0.1% / year
Datasheets pdf pdf
Manuals pdf
Remote control SW pdf

Versions & Options:

M109R-V1000 base version with RS232
M109R-Vxx1x 19" rack version, height 3HE
All Meatest instruments are available with 3, 4 and 5-year extended warranties.


option 10 Test cable 1000V/20A, 1m, black
option 191-11 Test cable 5000V/20A, 1m, red
RS232 adapter RS232-USB generic adapter
RS232 cable male-female RS232 cable, 2m